-83.21% is the change from 399 to 67
Calculation steps:
[( 67 - 399 ) ÷ 399] x 100 = -83.21%
Formula
Percentage change = [(67 - 399) / 399] x 100
Subtract the new number by the original number
67 - 399 = -332
-332 ÷ 399 = -0.8320802005012531
-0.8320802005012531 x 100 = -83.21%